Honestly, we could listen to Diane Keaton talk about tantric sex for DAYS, regardless if she's gettin' her slant on Ellen or not! LOLz!

While chatting it up with Ellen, Diane decided to pull some red wine from her purse. Things get a little giggly, a little sloppy, and she DOES start talking about orgasms and hours upon hours of tantric sex!

The best part of this interview (above) is how Ellen handles it — there's seriously no situation that she can't make hilarious!!

Check out the awkward talk and listen to Diane pontificate on Topher Grace and Robert De Niro being intimate with her in their new movie!!